The only problem my friend has with his is it can be hard to start when it's hot or been running awhile. He learned how to hold the throttle while starting and hasn't really had a problem with it since.
Oh and we can't figure out how to change the odometer to miles instead of kilometers! The manual doesn't say! LOL
Yep, I've heard about the hot starting issue on the older ones (pre-2005).
I'm not sure if his odometer works the same way, but on my Sprint's computer, if I hold down buttons 1 and 2 together for five seconds with the engine off but key on, it displays a number that can be changed by pressing button 1 (leftmost). Number 1 is Imperial gallons and miles, 2 is kilometers and liters, and 3 is US gallons and miles. Press button 2 (center) to select the new setting. Mine came set from the factory at 1, so when I first got the bike the computer kept telling me I was getting 55 mpg or so, since the imperial gallon is bigger. When I got it straightened out, my mileage suddenly dropped to around 45-47. Pressing and holding the reset button 5 seconds or more might do the trick for your friend.
Oh, and my change wasn't in the manual, either!